I am running into this myself and curious how others handle it.

Right now I run an AI agency (doing client work) and 3 SaaS products, and it is starting to get messy. Not just costs, but all the operational stuff behind each product.

Things like:

which email was used to sign up for each service where the domain was bought, when it renews, and who controls DNS where the app is hosted which database, auth, analytics, and payment providers it uses which service sends transactional emails whether there is a separate marketing email tool which APIs it depends on where files are stored which monitoring / support / error tracking tools are connected which services are dedicated to one product vs shared across several With one product it is manageable. With a few, plus agency work on top, it starts getting blurry fast. How are you handling this?